Patents by Inventor Michel Claude Renaud

Michel Claude Renaud has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Variable stiffness bellows
    Patent number: 6056018
    Abstract: A bellows is disclosed which includes a tube having plurality of raised circumferential convolutes formed in the surface of the tube, wherein at least one of the convolutes being formed so that a portion of the convolute is substantially even with the surface of the tube.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: May 2, 2000
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Michel Claude Renaud
  • Flexible tube having a variable stiffness bellows
    Patent number: D447792
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: September 11, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Michel Claude Renaud
  • Flexible tube having a variable stiffness bellows
    Patent number: D460536
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: July 16, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Michel Claude Renaud
  • Flexible tube having a variable stiffness bellows
    Patent number: D484953
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: January 6, 2004
    Assignee: E. I. duPont de Nemours and Company
    Inventor: Michel Claude Renaud